Drum mill



P. GOEBELS .DRUM MILL Filed March 9; 1927 f/zve/z for:

in order to warrant c'iid of the drum,

which Figure f partinents'h anda i Patented Cet. 25, 1927.

ED ST tiene PAUL GOEBELS., OF DSSAU, GERMANY;

DRUMv MILL.

Application filed Mills are known in which the grinding space is subdivided by longitudinal partition walls. In mills ot this formed by said walls inl one and the same direction. It there are, for instance, three grinding spaces iii thedrum' the material is subdivided into three portions which pass in parallel directions from the supply end of the drum to the delivery `end of the saine. Drums. ot this type must be relatively long obtaining a certain inencss of the ground and they are, therefore, heavy, expensive and require much pow-er.

The present invention obviates these drawbacks. It relates to an improved design of drum mills. 'These improved millsare only short, comparatively light and cli-cap, and require by tar less power .than the aforementioned mills. The invention is illustiated diagrammatically andby way'o eX- ample on the accompanying l is an axial section through va drum mill designed according kto this inveiition,v and Figure 2 a cross-section through the same. Y y Y rIhe constructional form shown as an eX- ample is a drum mill, the grinding space oi which is Vsubdivided by three longitudinal radial partition walls auf a into three grinding chambers or compartments Zi 0 d. There 1 are also two Jrontal chambersf 71, on the one side and g con the other. side of vgrinding chambers ZJ c d. Intermediate 4the chambers or compartments f and i as well as intermediate the 'chambers g oblique walls as shown'in Fig. l ofthe drawing. The grinding chamber b communicates with the compartments 7*' chamber c and the grinding chamber ,c with the com- The-material'to be ground the central sleeve drum by way ot the compartment'f, .ing chamber b, compartment g,

enters through grindber d, compartment i and outlet sleeve lc, as indicated by the arrows in Figl;

Of thetwo frontal walls ateither end of the drum, the inner walls are providedwith Y apertures ll for the passage of the materialV as showiiin Fig. 2.`

'These apertures are so arranged thatthe b 0 of the drum will,

longitudinal chambers a kind the material toV be ground passes through the chambers material `at the delivery drawing on i', are provided andy g, the grinding with the compartmentsl g and Jb,

ychambers and Y said e, and passes through the said passages being adapted to connect all o grinding chamber c, compartment h, grinding vcham- Y 'chambers into one chambers, ktrom here into Merch a, i927, seriai No. 174,035, and in Germany september 3, 1926.

be connected inv suoli rial will pass through the chambers f z, cated succession. While I have shown in the drawing a confstructional formin which thedrum is'subthe chambers a b c and and a i in the above india nianner that thematel divided into three grinding chambers, I wishy f to be understood that a grinding drum designed accordingto this invention may be subdivided into less than three or more than three chambers, that is to say, two or four or even more. It does not matter whether thev charging sleeve and `the. delivery sleeve are located on different ends of the Vsame end. In the caseof an odd number oi' grinding chambers thek two sleeves will be vlocated atdiierent ends of the drum, as in Fig. l', and in the case of an even number of chambers theywill be located at the same end co-aXially. v. 'Y j Vliatever 'number of grinding chambers may be ing pathv is constituted in every caseV by all chambers of the drum mill, so that the `total grinding length can be twice or thrice or four times etc. that of the length of the drum itself. This is what the invention has aimedy at, and attained.` 1 c I claim: Y l. SiV drum for mills comprising a plurality ofchambers arranged parallelly to eachv theidrum or on chosen, the total length o the grindtween said 'former chambers and said latter i.

chambers, whereby said connected -in v.succession tok each other.A

chambers will all be 'i y 2. 'A drum for `mills comprising a plural- -v ity of longitudinally arranged partition walls subdividing the drum into a plurality of parallel-chambers, chambersk provided at either 'end lot said drum, and'passages ybetween saidrontal longitudinal chambers,

said chambers in succession, whereby the maia plurality oit frontall t Y c 'A aan which is suppiiai to. the mui Wiii be i forced to pass oil said longitudinal the second of said frontal chambers yandv 'trom herev to. the second or" said longitudinal chambers and soorth, substantially. as V purposes set'rtorth. l

. In testimony whereof I aiXv my signature;

. `PAUL connais described and for the ,1 0

romone of said frontalv 105 'j 

